Apparatus for duplicating typewritten matter



n. K. LORE-NTZEN APPARATUS FOR DUPLICATIN'G TYPEWRITTEN MATTER.

, APPLICATION FILED SEPT. I7, 1917. 1,378,883.

Patented May 24, 19,21.

UNITED STATES PATENT OFFICE.

HANS K. LORENTZEN, OF NEW YORK, N. Y.

APPARATUS FOR DU PLICATING TYPEWRITTEN MATTER.

Specification of Letters Patent.

Patented May 24, 1921.

Application filed September 17, 1917. Serial No. 191,710.

1' 0 all whom it may concern Be it known that I, HANs K. LoRnN'rzEN, a subject of the King of Denmark, residing objects of the invention being to provide a machine of this character which will be relatively simple and inexpensive in construction, easy to operate and efiicient forthe purposes intended.

Briefly stated,the invention comprises an impression member and a carriage arranged to, traverse the same, said carriage being constructed to register the sheets and provided with a roller for pressing the sheets down on the impression 'member during traverse of the carriage.

A special feature is a gage for front-registering the sheets adapted'to be brought into registering position when the sheets are being positioned on the carriage and to be retracted when the presser roller 'is lowered onto the sheet.

Other features will become apparent as the specification proceeds.

In the accompanying drawing I have illustrated the invention embodied in a practical concrete form but changes and modifications may be made without departure from the true spirit and scope of the invention.

Figure 1 of said drawing is a top plan view of the device; Fig. 2 is a side view thereof with the end portions of the base broken away and appearing in section; Fig. 3 is an enlarged broken view of the carriage showing the parts in different positions in dotted and full lines.

'The. impression member consists in the illustration, of a transfer blanket 5, of gelatinous material, stretched over a bed 6, which is supported on a suitable frame or base 7. t 1

The carriage is made up of side members 8, .carrying rollers 9 riding on the sides 10, of the frame, said side members being'connected .byan inclined sheet supporting table 11. The lower end of this inclined table terminates just above the impression. surface and an open sace 12 is providedin the carriage adjoining said. lower e'r'idoi the table to permit the lower end of a sheet laid on the table to rest directly on the lmpression surface, as indicated in full lines in Fig. 3. t

The sheets are brought into proper front register on the impression member by coming intoengagement with a front gage 18, wlnch, at the time of feeding in a sheet is lowered close to the impression surface so as to form a stop for the lower edge of the sheet. For the purpose of retracting this gage from its registering position it is shown slidably mounted in slots 14 in the sidesof the carriage, inclined away from the lmpression surface.

The sheets are side-registered by means of a side gage 15, on the table 11, which,

may be adjustably held'in place thereon by belng hooked over the'upper edge of the table and provided with a clamping screw 16. i

.17 designates the presser member, shown in the form of a roll journaled at its ends in a frame 18 which is pivoted at 19 between the sides of the carriage, this frame being rocked on its pivots to raise and lower the roller by means of an upstanding handle 20 attached to the frame. The presser roll is disposed above the open space at the foot of the sheet table so as to engage the edge of the sheet registered on the impression surface against the front'gage.

The presser roll and front gage are interconnected so that when the roll is lifted the gage will be in position to register the sheets and when the roll is lowered the gage will be retracted out of engagement with the sheet and out of the way of the presser roll. The means for this purpose consists of the elbow levers pivoted at 21 on the sides of the carriage, and forked on their laterally extending arms at 22 to engage the extended journals 23 of the roll and en gaging with their dependent arms 24. in seats or slots 25 in the ends of the front gage. It will be seen from this thatas the roll is lifted the elbow levers will be rocked to slide the front gage forward and downward on their guides into a registering position and that as the roll is lowered the gage will be withdrawn out of the path of the roll and out of registering position.

In practice, the copy, which has been made in suitable copyingink, is pressed face down on the transfer surface. This leaves the de- The carriage is then drawn to the left, in the drawing, as by means of the handle 20, which serves to thus also simultaneously 11ft the roll and place the front gage in operative position. A sheet is then positioned on the carriage with its side edge registered against the side gage, which previously has been set to the proper position, and its front edge registered against the lowered front gage. In this position the lower edge of the sheet bears on the impression surface. The roll is I pressed sheet will be stripped off the impression member. The handle may be conveniently used for producing both the traversing movements of the carriage and the raising and lowering movements of the roll. Springs 26 may be provided for holding the roll yieldingly down on the impression member, these springs being shown as carried by the sides of the carriage and bearing on the projected journals of the roll.

The operation of the device is so simple as to require no special skill and it will be noted that there are no complicated or delicate parts to get out of order. The number of impressions possible from a given copy will depend upon the character of the transfer left on the transfer surface, and fresh transfer surfaces are provided as needed by winding the transfer blanket in one direction or the other on the supporting rolls 27 as usual in this class of machines. 7

I claim:

1. Duplicating apparatus comprising an impression member, a carriage traversing the same, means for side registering a sheet on the carriage, a slidable front register on the carriage, a presser member on the carriage, means for lowering and raising said presser member and means coacting with said front register and the presser member 'for sliding the said register out of or into registering position according to the lowering and raising of said presser member.

2. Duplicating apparatus comprising an impression member, a carriage traversing the same, slidable means on said carriage for registering a sheet with the front portion thereof resting on the impression member, a presser roller on the carriage for pressing said front portion and successive portionsof the sheet down on the impression vmember, means for lifting and lowering said presser for lowering said roller onto the portion of the sheet resting on the impression member and for shifting the register.

4. In combination, an impression member, a carriage traversing the same provided with an inclined sheet supporting table and having an open space adjoining the lower end of the table to permit the. lower portion of a sheet on the table to rest on the impression member, a slidable register mounted on the carriage, a vertically movable roller 'mounted in the carriage above said open space, and means pivoted on the carriage for liftingand lowering said roller andshifting the register. v v

5. In combination, an-impression member, a carriage traversing the same provided with an inclined sheet supporting table and having an open space adjoining the lower end of the table to permit the lower portion of a sheet on the table to rest on the impression member, a vertically movable roller mounted in the carriage above said open space, means for lifting and lowering said roller, a movable sheet gage slidably i mounted on the carriage and working in said open space below the roller, and means having connection withthe roller for retracting said gage out of the path of the roller when said roller is lowered.

6. In combination with an impression member and a horizontally traversing carriage, a side sheet register on the carriage,

a horizontally slidable front gage on the carriage, a vertically movable roller on the carriage above the front gage, and means connecting the roller with the front gage for simultaneously sliding the front gage into or out of operative position according to the vertical movements of theroller on the carriage.

7. In combination with an impression member, a carriage traversing the sameand provided with an inclined sheet supporting table terminating short of the impression member to permit the lower edge portion of a sheetthereon to rest on the impression member, a front gage, for registering the front edge of such a sheet, cooperating guides on the carriage and frontvgage inclined with respect to the impression memher, a vertically movable presser roller mounted in the carriage above the front gage, operating means for lifting and lowering said roller, and connections from said operating means for shifting the front gage.

8. Duplicating apparatus comprising a bed for supporting a transfer surface, a carriage traversing said bed and having upstanding side walls above said transfer surface, an inclined sheet table carried by said side walls, a side gage on said table, a front gage adjacent the lower end of the table, the side Walls of the carriage having guide slots receiving the front gage and inclined with respect to transfer surface, a frame pivoted between said side Walls, a presser roller mounted in said frame and having protruding journals at opposite ends of the frame, a handle for raising and lowering the roller frame and elbow levers pivoted on the side walls of the carriage each engaging a roller journal at one end and the front gage at its opposite end.

In testimony whereof I afiix my signature.

HANS K. LORENTZEN. 

